[PATCH U-Boot] ARM: rpi_b: detect board revision

Matthias Klein matthias.klein at linux.com
Wed Nov 19 10:22:05 PST 2014

Am 19.11.2014 um 18:43 schrieb Stephen Warren:
> On 11/18/2014 09:40 PM, Stephen Warren wrote:
>> Detect the board revision early during boot, and print the decoded
>> model name.
>> Eventually, this information can be used for tasks such as:
>> - Allowing/preventing USB device mode; some models have a USB device on-
>>    board so only host mode makes sense. Others connect the SoC directly
>>    to the USB connector, so device-mode might make sense.
>> - The on-board USB hub/Ethernet requires different GPIOs to enable it,
>>    although luckily the default appears to be fine so far.
>> - The compute module contains an on-board eMMC device, so we could store
>>    the environment there. Other models use an SD card and so don't 
>> support
>>    saving the environment (unless we store it in a file on the FAT boot
>>    partition...)
>> Set $fdtfile based on this information. At present, the mainline Linux
>> kernel doesn't contain a separate DTB for most models, but I hope that
>> will change soon.
> BTW, I should have mentioned that I'm hoping the kernel people CC'd 
> here will take a look at the DTB filenames this patch assumes, and 
> comment on whether they seem reasonable. If so, we can formulate a 
> patch for the kernel to actually create all those DTs in the nearish 
> future.
The DTB filenames look good for me.

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